Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 176 · 40 questions

The method (Round, then calculate): Round each number to the nearest ten, hundred or whole number. Do the easy sum with the rounded numbers. Pick the option nearest to it. To round a number, look at the digit after the place you keep: 5 or more goes up, less than 5 stays.

1. 1.Which is closest to 503 × 89? (Round each number first.) (a) 90000 (b) 45000 (c) 450000 (d) 4500
2. 2.Round 61737 to the nearest hundred.
3. 3.Which is closest to 603 × 40? (Round each number first.) (a) 240000 (b) 24000 (c) 2400 (d) 48000
4. 4.Which is closest to 505 + 601 + 203? (a) 1300 (b) 1400 (c) 1500 (d) 1200
5. 5.Round 79635 to the nearest thousand.
6. 6.Which is closest to 799 × 78? (Round each number first.) (a) 64000 (b) 640000 (c) 6400 (d) 128000
7. 7.Round 72.42 to one decimal place. =
8. 8.Which is closest to 1591 ÷ 39? (a) 400 (b) 20 (c) 40 (d) 80
9. 9.Round 31300 to the nearest thousand.
10. 10.Which is closest to 701 + 900 + 304? (a) 1800 (b) 2100 (c) 2000 (d) 1900
11. 11.Which is closest to 303 × 49? (Round each number first.) (a) 15000 (b) 30000 (c) 150000 (d) 1500
12. 12.Round 80.84 to one decimal place. =
13. 13.Round 29.13 to one decimal place. =
14. 14.Which is closest to 1608 ÷ 19? (a) 40 (b) 800 (c) 80 (d) 160
15. 15.Which is closest to 500 × 48? (Round each number first.) (a) 25000 (b) 50000 (c) 250000 (d) 2500
16. 16.Which is closest to 495 + 298 + 395? (a) 1200 (b) 1400 (c) 1100 (d) 1300
17. 17.Which is closest to 1606 ÷ 19? (a) 160 (b) 80 (c) 40 (d) 800
18. 18.Which is closest to 701 × 39? (Round each number first.) (a) 56000 (b) 2800 (c) 280000 (d) 28000
19. 19.Which is closest to 891 ÷ 31? (a) 30 (b) 300 (c) 15 (d) 60
20. 20.Which is closest to 404 × 89? (Round each number first.) (a) 360000 (b) 36000 (c) 72000 (d) 3600
21. 21.Which is closest to 299 × 59? (Round each number first.) (a) 1800 (b) 18000 (c) 180000 (d) 36000
22. 22.Round 53.39 to one decimal place. =
23. 23.Which is closest to 196 + 698 + 302? (a) 1200 (b) 1300 (c) 1100 (d) 1400
24. 24.Round 21501 to the nearest ten.
25. 25.Round 26.78 to one decimal place. =
26. 26.Round 27904 to the nearest hundred.
27. 27.Which is closest to 498 × 41? (Round each number first.) (a) 40000 (b) 20000 (c) 200000 (d) 2000
28. 28.Which is closest to 497 × 31? (Round each number first.) (a) 30000 (b) 15000 (c) 1500 (d) 150000
29. 29.Which is closest to 198 + 197 + 596? (a) 1000 (b) 1200 (c) 900 (d) 1100
30. 30.Round 53607 to the nearest thousand.
31. 31.Which is closest to 903 × 38? (Round each number first.) (a) 3600 (b) 36000 (c) 72000 (d) 360000
32. 32.Round 14.73 to one decimal place. =
33. 33.Round 41.14 to one decimal place. =
34. 34.Which is closest to 896 × 79? (Round each number first.) (a) 72000 (b) 720000 (c) 144000 (d) 7200
35. 35.Which is closest to 500 × 69? (Round each number first.) (a) 3500 (b) 35000 (c) 70000 (d) 350000
36. 36.Which is closest to 399 + 403 + 599? (a) 1600 (b) 1500 (c) 1400 (d) 1300
37. 37.Which is closest to 1599 ÷ 39? (a) 400 (b) 20 (c) 40 (d) 80
38. 38.Round 64827 to the nearest ten.
39. 39.Which is closest to 204 × 80? (Round each number first.) (a) 1600 (b) 16000 (c) 32000 (d) 160000
40. 40.Which is closest to 497 + 796 + 796? (a) 2300 (b) 2200 (c) 2000 (d) 2100

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